Crossword clue: a hard and corrosion resistant mineral that is a natural alloy of osmium and iridium ; used in needles and pen nibs etc.
2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
a hard and corrosion resistant mineral that is a natural alloy of osmium and iridium ; used in needles and pen nibs etc.
a hard and corrosion resistant mineral that is a natural alloy of osmium and iridium ; used in needles and pen nibs etc.